<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>重新排列句子中的单词</title>
</head>
<body>
  <script>
    function fn(text) {
      let str = text.toLowerCase().split(' ').sort((a, b) => a.length - b.length).join(' ');
      return str[0].toUpperCase() + str.slice(1)
    }
    console.log(fn('Leetcode is cool'))
  </script>
</body>
</html>